Educational toy

Abstract

An educational toy comprises in combination a base, a pair of boards and a series of replaceable quiz-and-answer plates. The base has a central spindle. The boards and one of said plates are superimposed over said base. Each board is provided with one groove which is curved in opposite directions between the two boards in such a way that a crossover is formed. A magnet is buried in said crossover. There are various well-designed representations on each plate. An indicator is displaceable over said plate to indicate whether the selected answer is correct or wrong.

What we claim is: 
     
       1. An educational toy comprising: a base provided with a spindle at about the center thereof, the spindle consisting of a cylindrical stem portion and a non-circular cross-section head portion;   a pair of boards superimposed over said base by inserting through a hole at the center of each board said spindle and retained at said stem portion thereof, wherein the lower board is formed on the top surface thereof with an upwardly opened groove curved in one horizontal direction, while the upper board similarly is formed on the bottom surface thereof with a downwardly opened groove curved in another horizontal direction, in such a way a crossover is formed by said two grooves, and a magnet free-movably buried in said crossover;   a series of replaceable quiz-and-answer plates selectively mountable over said upper board, each plate being provided with a corresponding non-circular cross-section hole at the center thereof for snapping on said head portion of said spindle, the plate having well designed representation thereon for selecting answers to reach the educational purposes; and   a movable indicator displaceable over said plate and containing a magnet, thereby utilizing the attraction between said magnet and the magnet buried inside said crossover to indicate whether the answer selected is correct or wrong.   
     
     
       2. A toy as claimed in claim 1, wherein the upper board has a setting means matching a notch on said plate to fix the position of said upper board angularly relative to said plate. 
     
     
       3. A toy as claimed in claim 1 wherein the lower board has an operating means to turn said lower board and vary its position angularly relative to both said base and said upper board, and thus change accordingly the position of said crossover formed by said two grooves on said lower board and said upper board. 
     
     
       4. A toy as claimed in claim 1 wherein the magnet buried in the crossover formed by said two grooves is preferably of a cylindrical shape with a height at least greater than the depth of any one of said grooves but less than the total depth of said two grooves. 
     
     
       5. A toy as claimed in claim 1 wherein the upper board has a recess on its top surface for easy removal of said plate. 
     
     
       6. A toy as claimed in claim 1 wherein the plate has a notch at its outer periphery. 
     
     
       7. A toy as claim in claim 1 wherein the plate is embedded with at least one magnet. 
     
     
       8. A toy as claimed in claim 7 wherein the plate may be attached with an outer layer at either side or both sides thereof. 
     
     
       9. A toy as claimed in claim 1 wherein the indicator is preferably of an oval shape.